Fig. 3. (A) Profile of intracellularly stained neuron #1. Neuron #1 has a large cell body and gives off dendritic branches in the next-anterior ganglion (double arrows in TG3). Its axon was traced near DEM2. Bar, 300µm. Based on this result, Lucifer Yellow was extracellularly applied to the distal cut end of npm (B). As a result, some motor neurons (arrowheads in the next-anterior ganglion, TG3) and neuron #1 are labeled (Bi). The photograph was taken under normal and ultraviolet light. (Bii) is rotated by 90° relative to (Bi). Bar, 500µm. N1/N2, first and second segmental nerve; N3, third segmental nerve; npm, nerve to deep extensor muscles; SR, stretch receptor; TG, thoracic ganglion.